[llvm-branch-commits] [llvm-objcopy] Support CREL (PR #97521)

[Fangrui Song via llvm-branch-commits]

MaskRay wrote:

> Not that the patch is especially long/complicated, but could be split into the refactor/move of the MC function, then the new usage, if you like (usual reasons - smaller patches are easier to root cause, functionality can be reverted without thrashing the refactored code (or refactored code can be reverted if issues are found in that before the usage goes in), etc)

The body of `encodeCrel` is a simple move. Even with a signature change, the two parts (extract and adapt assembler + support llvm-objcopy) could still be considered separate.
However, some reviewers might prefer seeing both parts together for a better understanding of the extracted API.

Based on the comments from jh7370 and smithp35, the extraction seems reasonable.
**How about I landing the extraction part separately after receiving official feedback?
I will then rebase this llvm-objcopy patch.**

(I maintain patches in a stack and ensure the final one https://github.com/MaskRay/llvm-project/commits/demo-crel/ passes a local integration test.
There is some process inconvenience given that the llvm-objdump PR also modifies Object and has been approved yet...)


https://github.com/llvm/llvm-project/pull/97521